Questions
If is a tangent to the ellipse for some , then the distance between the foci the of ellipse is
detailed solution
Correct option is B
3x+4y=122⇒4y=−3x+122⇒y=−34x+32Condition of tangency c2=a2m2+b2⇒18=a2.916+9⇒a2.916=9⇒a2=16⇒a=4⇒e=1−b2a2=1−916=74∴ae=74.4=7 ⇒foci are ±7,0∴ distance between foci =27Talk to our academic expert!
Similar Questions
Let P be any point on the directrix of an ellipse of eccentricity e. S be the corresponding focus and C the centre of the ellipse. The line PC meets the ellipse at A. the angle between PS and tangent at A is , then is not equal to
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